Bosch WORCESTER Sense II, Installation Instructions Manual

Page: 39 / 64

39
Service menu
Sense II – 6 720 818 367 (2015/10)
• Room temperature threshold : If the room temperature
falls below the desired temperature for the setback mode,
the heating system works as in the reduced mode. If the
room temperature exceeds the desired temperature, the
heating system is off. This setback type is:
– suitable for open-plan buildings with few adjoining
rooms without own user interface
– less comfortable than the reduced mode
– more economical than the reduced mode
– only available if the room temperature is recorded.
If the heating system should be off in the setback phases (frost
protection remains active), set the following main menu
option:
Heating > Temperature settings > Setback > Off
(standby mode).
Heat constantly below a certain outside temperature
The heating system can cool down under a certain value due to
the setback mode. This serves to maintain a comfort heat.
In Heat constantly below mode you can set at what outside
temperature the setback mode is interrupted (in reference to
the adjusted outside temperature).
Fig. 25 and 26 show how the frost protection function works,
with and without this parameter activated. Selected settings:
Setback type : Outside temperature threshold and Reduced
mode below : 5 °C.
Fig. 25 Effect at setting
Off
(default setting)
Fig. 26 Effect at setting – 15 °C
Key to Fig. 25 and 26:
T
A
Outside temperature
T
VL
Flow temperature
[1] Standby mode (

Setback types)
[2] Reduced mode (desired room temperature for setback
mode)
[3] Heating mode (desired room temperature for heating
mode)
If the outside temperature falls below –15 °C, the heating
system goes out of the reduced mode into the heating
mode[3]. This allows smaller heating surfaces to be utilised.
Frost protection limit temperature (outside temperature
threshold)
Under this menu item the limit temperature for the frost
protection (outside temperature threshold) is set. It is only
effective if
Outdoor temp. or Room and outdoor temp. is set
in the Frost protect menu.
T
A
T
VL
5°C
2
1
6 720 645 480-33.2O
NOTICE:
Domestic hot water pipework may
freeze if the frost protection limit temperature
is set too low and in prolonged periods with
outside temperature below 0 °C.
▶ Adjust frost protection limit temperature
(default setting = 5 °C) to the heating
system.
▶ Do not set the frost protection limit
temperature too low. Damage caused by a
low frost protection limit temperature is
not covered by theproduct warranty.
▶ Set frost protection limit temperature and
frost protection for all heating circuits .
▶ To ensure frost protection for the entire
heating system, set either Outdoor temp.
or Room and outdoor temp. in the Frost
protect menu.
T
A
T
VL
5°C -15°C
2
3
1
6 720 645 480-34.3O